KR101010909B1 - The apparatus and method of supervisory control and data acquisition - Google Patents

Abstract

PURPOSE: An apparatus and a method of supervisory control and data acquisition are provided to reduce interference due to wireless channel fading and time delay. CONSTITUTION: A data generator(110) watches an operation state and generates measured data. A transmission signal modulator(120) modulates the generated information data by a symbol unit through m-PSK. A spreading code generator(130) generates a spreading code by using a zero correlation duration code set which is continuously orthogonal during a certain section. A band spreading unit(140) spreads the modulated information data through the generated spreading code. A band filter transmitter(150) transmits the spread signal to a remote supervisory control terminal.

Description

Interference elimination type remote and remote monitoring and control device using continuous orthogonal codeset {THE APPARATUS AND METHOD OF SUPERVISORY CONTROL AND DATA ACQUISITION}

The present invention relates to an interference elimination type remote and remote monitoring control apparatus and method using a continuous orthogonal codeset applied to existing remote and remote monitoring control.

In the case of the conventional remote / remote monitoring control system, performance deterioration occurs due to interference caused by delay time in the communication between the sensor and the terminal.

In order to remove such interference by multiple access, time division / frequency division / code division schemes are used.

In the case of time division (TDM) and frequency division (FDM) multiple access, the efficiency of limited resources is inferior. Therefore, interference is removed using orthogonality of spreading codes while efficiently using resources using code division (CDM) technique. Many techniques are used.

When the code division multiple access scheme is applied to the remote / remote monitoring control system, different codes having orthogonality are assigned to each sensor, and the terminal separates the signal of each sensor through a correlation process.

Conventional spreading codes have no problem in separating different codes if the orthogonality is secured, but the orthogonality of the code is degraded due to interference due to fading and delay of the radio channel, resulting in performance degradation.

Korean Patent Registration Publication No. 10-0880211 (January 28, 2009 announcement)

In order to solve the above problems, in the present invention, a spreading code type sensor node unit and a remote control terminal are configured, so that the effects of interference due to radio channel fading and delay time can be avoided by using spreading codes having a characteristic of orthogonal orthogonality for a predetermined period. It is an object of the present invention to provide an interference canceling remote / remote monitoring control device and method using a continuous orthogonal codeset that can improve the performance of a plurality of sensor nodes and data communication in a control terminal period.

In order to achieve the above object, an interference cancellation type remote and remote monitoring control apparatus using a continuous orthogonal code set according to the present invention

It is installed on one side of the equipment to monitor the operation status or measure the operation status, and it monitors the operation status and generates the spreading code which is orthogonal to the measured data continuously for a certain period. Remote sensor node unit for sending to the monitoring control terminal,

Located near the remote sensor node and receiving information data from the remote sensor node, sending command data, and determining the maximum likelihood of selecting the maximum value by deriving the correlation characteristics of the spreading code received from the remote sensor node. It is achieved by consisting of remote and remote monitoring control terminal that eliminates bidirectional data signal interference between a plurality of remote sensor node units based on the (Maximum Likelihood Decision) method.

In addition, the interference elimination type remote and remote monitoring control method using a continuous orthogonal code set according to the present invention

Monitoring the operation state in the data generating unit of the remote sensor node unit and generating measured data as a digital signal (S10);

Modulating the information data generated by the data generator by the transmission signal modulator by symbol unit using m-PSK (S20);

Generating a spreading code by using a spreading code set continuously orthogonal for a predetermined period in the spreading code generation unit (S30);

Spreading the information data modulated by the transmission signal modulator through a spreading code by the spreader (S40);

Transmitting the signal spread by the spreader to the remote / remote monitoring control terminal (S50);

Receiving from a plurality of remote sensor node units at a band filter receiver of a remote / remote monitoring control terminal (S60),

Performing a signal processing process through a maximum likelihood decision method of deriving a correlation characteristic of a spreading code received from a soft decision-based based correlation processor and selecting a maximum value (S70);

Generating a reference code used for the soft decision-based correlation processing unit in the reference code generator (S80);

Demodulating the signal received by the band filter receiver by the received signal demodulator (S90);

This is achieved by the step (S100) of restoring data in the data restoration unit.

As described above, in the present invention, unlike the existing time division and frequency division multiple access schemes, the interference due to multiple access can be eliminated while using resources efficiently, and by using a spreading code that is orthogonal for a certain period, By reducing the influence of interference due to radio channel fading and delay time, there is a good effect of improving the communication performance without interruption of data communication between the plurality of sensor nodes and the control terminal period.

1 is a block diagram showing the components of the interference elimination type remote and remote monitoring and control device using a continuous orthogonal code set according to the present invention,
2 is a block diagram showing the components of the remote sensor node unit 100 according to the present invention;
3 is a block diagram showing the components of the remote and remote monitoring and control terminal 200 according to the present invention,
4 is a block diagram showing the components of a spreading code generation unit according to the present invention;
5 is a block diagram showing the components of the binary zero correlation section code 131 according to the present invention;
6 is a block diagram showing the components of the ternary zero correlation section code 132 according to the present invention;
7 is a graph showing the cross-correlation characteristics of the spreader zero correlation section spreading code having a 64-chip period according to the present invention;
8 is a graph illustrating autocorrelation and cross-correlation characteristics of a ternary zero-correlation spread code having a 128-chip period according to the present invention;
9 is a flowchart illustrating a method for eliminating interference and remote monitoring using a continuous orthogonal codeset according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing the components of the interference elimination type remote and remote monitoring and control device using a continuous orthogonal code set according to the present invention, which is a remote sensor node unit 100 and the remote and remote monitoring control terminal It consists of 200.

First, the remote sensor node unit 100 according to the present invention will be described.

The remote sensor node unit 100 is installed on one side of the device for monitoring the operation state or measuring the operation state, and generates a spreading code that is orthogonally orthogonally intersected to the measured data for a certain period, and through the spreading code. It spreads the spectrum and sends it to the remote / remote monitoring control terminal located at a short distance.

That is, the remote sensor node unit according to the present invention transmits the spread-modulated data by successive orthogonal codes, respectively.

The remote sensor node unit 100 includes a data generator 110, a transmission signal modulator 120, a spread code generator 130, a band spreader 140, and a band filter transmitter 150.

The data generating unit 110 monitors an operation state and serves to generate measured information data.

Here, generating information data refers to generating data with a digital signal.

That is, the information data is information necessary for monitoring control of remote and remote monitoring control terminals, and digital information data is generated by converting an analog or digital source into binary information bits.

The analog information source converts the analog information into binary digital information bits through pulse code modulation (PCM), and the digital information source is used as is or compression to generate more effective digital information bits.

The transmission signal modulator 120 modulates the information data generated by the data generator by symbol unit using m-PSK.

The m-PSK modulates and demodulates the digital information generated by a device (= data terminal device) that monitors the operation state or measures the operation state so as to suit the transmission characteristics of the communication network. When the phase is ',' and the phase is shifted 180 degrees when '0', the performance decreases as M increases, but the bandwidth reduction effect is achieved.

Here, digital modulation is necessary because it is possible to increase the capacity of information processing, improve data security, communication quality, and transmission speed.

PSK modulation is a modulation method that changes the phase of a carrier according to a digital signal, and transmits data by dividing data by phase difference of frequency.

A phase modulation scheme in which a binary digital signal is divided into m bits and divided into m = 2 ⁿ phases is called m-PSK modulation. Binary (BPSK), quaternary (QPSK), octal (8-PSK), and hexadecimal ( 16QAM).

Since PSK modulation has a constant amplitude, it is strong in the effects of channel fading, and since there is little frequency variation, stable communication is possible.

The spreading code generator 130 generates a spreading code by using a zero correlation duration (ZCD) code set that is orthogonally orthogonal for a predetermined period.

Here, a description will be given of a spreading code having a characteristic that the performance of the far-field / remote monitoring control device according to the present invention depends on the spreading code and is continuously orthogonal.

및

가 존재할 때, 주기상관함수(Shift τ)를 다음의 수학식 1과 같이 정의된다.First, the binary sequence of any period N,

And

When is present, the periodic correlation function (Shift τ) is defined as in the following equation (1).

)와 주기상호상관 함수의 최대치(

)는 상호간에 트레이드오프(Trade-off)관계에 의한 이론적인 한계치를 갖고 있음이 증명된다.In the above Equation 1, when x = y, an autocorrelation function (ACF) is obtained, and when x ≠ y, a cross-correlation function (CCF) is obtained. At this time, the maximum value of the side love of the periodic autocorrelation function (

) And the maximum value of the periodic cross-correlation function (

) Proves to have theoretical limits due to trade-off relationships.

와

을 연속적으로 0이 되게 하는 이진 코드를 만들 수가 있다.However, when τ = 0, within a specific area around

Wow

You can write binary code that makes 0 consecutively zero.

This continuous Local Duration is defined as Zero Correlation Duration (ZCD) in the present invention.

Through this zero correlation interval characteristic, in the present invention, it is possible to establish a quasi-synchronous interval without multi-user interference, particularly in the uplink of an orthogonal code system.

In addition, the zero-correlation section spreading code that is orthogonally intersected for a certain period according to the present invention is composed of two types of binary zero-correlation section code 131 and ternary zero-correlation section code 132. do.

The spread spectrum unit 140 spreads the information data modulated by the transmission signal modulator through a spread code generated by the spread code generator.

The spread spectrum method is a communication method that spreads and transmits a bandwidth that is much wider than a band required for signal transmission, and is not affected by jamming, interference, and channel fading that occur during transmission, and the information on the code spread by the transmitting side at the receiving side is transmitted. It is advantageous in terms of information protection because information can be recovered after knowing.

The spread spectrum unit spreads the data through the spreading code of the continuous orthogonal section generated by the spreading code generator.

The band filter transmitter 150 transmits the signal spread by the band spreader to the remote / remote monitoring control terminal.

The band filter transmission unit transmits the generated baseband signal to the RF communication band through the RF front end module and converts the frequency to a communication band through a mixer.

Next, the remote / remote monitoring control terminal 200 according to the present invention will be described.

The remote / remote monitoring control terminal 200 is located at a short distance from the remote sensor node unit, receives information data from the remote sensor node unit, transmits command data, and has a correlation characteristic of a spreading code received from the remote sensor node unit. This function removes the bidirectional data signal interference between a plurality of remote sensor node units based on the Maximum Likelihood Decision method.

The remote / remote monitoring control terminal 200 is configured to be able to read the values of the remote sensor node parts without interference even though the distances of multiple accesses from the respective sensor nodes are all different.

That is, even if the data of the remote sensor node parts are signals spread by the continuous orthogonal spreading code even when multiple accesses are made to the remote / remote monitoring control terminal 200, the receiving unit (the remote / remote monitoring control terminal) has a constant time for the continuous orthogonal characteristics. As a result, delay interference does not exist.

The remote and remote monitoring and control terminal 200 according to the present invention is composed of a rectangular box-shaped body, a band filter receiver 210, a soft decision-based correlation processing unit 220, a reference code generator 230 inside the body. ), A received signal demodulator 240 and a data recovery unit 250.

The band filter receiver 210 serves to receive from a plurality of remote sensor node units.

This is the part that receives the signal through the band filter for the communication band. The received RF signal is lowered into the baseband signal through the mixer and converted into the digital signal through the PCM.

The soft decision-based correlation processing unit 220 performs a signal processing process through a maximum likelihood decision method of deriving a correlation characteristic of a received spreading code and selecting a maximum value.

It calculates the peak value by correlating the received data with the code generated by the reference code generator.

The continuous orthogonal section code used in the present invention reduces the orthogonality of the data transmitted through the channel after spreading in the transmission unit, and the cross-correlation value increases, thereby reducing the influence of the interference due to the characteristics of the continuously orthogonal sections. Can be.

Through autocorrelation, a value above the threshold is 1, and a value less than 0 is determined through soft decision to restore the data before spreading.

The reference code generator 230 generates a reference code used for the soft decision-based correlation processor.

The received signal demodulator 240 demodulates the signal received by the band filter receiver.

The received signal demodulator demodulates data demodulated through despreading into digital information through m-PSK demodulation. PSK modulation is demodulated through synchronous detection, and synchronous detection is a detection method that reproduces a local carrier according to the frequency and phase of a received carrier.

The carrier is extracted from the received signal and the data is demodulated through the product of the carrier and the received signal.

It is also called Product Detection because it multiplies, and it does not include the noise component received in the reference carrier because it creates a reference carrier that does not change its phase from the modulated received wave and detects the phase of the modulated wave based on this. Error rate characteristics are good.

Recovery is possible even with a relatively weak signal, which is superior to asynchronous detection, but has a relatively complex structure.

The data recovery unit 250 restores data demodulated by the reception signal demodulator.

This part restores original information in digital or analog form based on the data demodulated by the received signal demodulator. Remote and remote monitoring control is performed using the restored data.

Hereinafter, the binary zero correlation section code 131 and the ternary zero correlation section code 132 of the spread codes generated by the spread code generation unit 130 according to the present invention will be described.

First, the binary zero correlation section code 131 according to the present invention will be described.

The binary zero correlation section code 131 has a constant time of less than (N / 2 + 1) chip cross correlation with the side love around the peak of the autocorrelation value for a code whose cycle is N chips (N is a natural number). A zero spreading code is generated during the interval, and includes a binary autocorrelation section preferred pair code generation unit (BZPP: Binary ZCD Preferred Pair) 131a and a binary continuous orthogonal code set setting unit 131b.

The binary autocorrelation section preferred pair code generation unit 131a generates a binary zero correlation section preferred pair code in which a zero correlation property is maintained by extending a code period for a code having a period of N chips (N is a natural number). Play a role.

The binary autocorrelation section preferred pair code generation unit 131a according to the present invention generates the binary zero correlation section preferred pair code through the following process.

First, an initial basic matrix (G) is constructed as shown in Equation 2.

라고 하면,

로부터 다른 확산코드

를 생성할 수 있는데, 이때의

와 의 관계는

과 같이 된다.In the matrix G, 1 and -1 are represented by + and-for convenience. Four-chip spreading code for any row constituting matrix G or -G

Speaking of

Spreading codes from

Can be generated, where

Wow The relationship of

Becomes

,

는

칩의 제로상관구간(ZCD)을 가지며, 이들을 초기 BZPP(Binary ZCD Preferred Pair)라고 정의한다.
Here, one pair of codes of these periods 4

,

Is

It has a zero-correlation interval (ZCD) of the chip, which is defined as an initial binary ZCD Preferred Pair (BZPP).

칩 이하의 제로상관구간을 가진 M개의 코드로 이루어진 이진 연속 직교하는 코드셋을 생성시키는 역할을 한다.The binary continuous orthogonal code set setting unit (BZCS: Binary ZCD Code Set) 131b and 131b are provided for a code period N = 4 × 2i (i = 0, 1, 2, 3, ...).

It generates a binary continuous orthogonal codeset consisting of M codes with zero correlation intervals below the chip.

칩 이하인 이진 코드들의 셋(Set)을 의미한다.The BZCS composed of the M codes has the same zero-correlation section between M codes, and the length of the section is

A set of binary codes below the chip.

As an example, Figure 4 relates to a graph relating to the cross-correlation characteristics of the binary zero correlation interval spreading code having a 64-chip period according to the present invention.

,

을 가지고 칩 쉬프트 동작을 수행함으로서 생성할 수 있다.This BZCS is BZPP

,

Can be generated by performing a chip shift operation.

,

이용하여, M개의 코드로 구성되는 주기 N칩의 BZCS는 수학식 3과 생성된다.A chip shift actuator that shifts code by one chip counterclockwise,

,

Using this, the BZCS of a period N chip composed of M codes is generated by the equation (3).

의 조건을 만족해야 한다. 그리고, M과 새로이 생성된 코드의 제로상관구간 간에는 수학식 4와 같은 관계식이 존재한다.Where? Is the increment of the chip shift and k is the maximum shiftable number for a given code. And Δ and k are positive and nonnegative integers, respectively.

The conditions of Then, there is a relational expression as shown in Equation 4 between M and the zero correlation section of the newly generated code.

Equation 5 below shows an example of BZCS consisting of six codes having zero correlation interval = 5 chips in a period 32 chip when the maximum shiftable number k is 2 and the chip shift increment Δ is 3.

[ Equation 5 ]

M ₁ = (-+-+++-++-++++-++-+ --- +++-++++-)

M ₂ = (-++++-+++ --- +-+++ ---- +-+ --- +-++)

M ₃ = (-+++-++-++++-++-+ --- +++-++++ --- +)

M ₄ = (++-+++ --- +-+++ ---- +-+ --- +-++-++)

M ₅ = (+-++-++++-++-+ --- +++-++++ --- +-++)

M ₆ = (+++ --- +-+++ ---- +-+ --- +-++-++++-)

Next, a ternary zero correlation section code 132 according to the present invention will be described.

The ternary zero correlation section code 132 has a constant time of less than (0.75N + 1) chip correlation with the side love around the peak of the autocorrelation value for a code whose cycle is N chips (N is a natural number). It serves to generate a spreading code that becomes zero during the section, which is composed of a ternary autocorrelation section preferred pair code generation unit 132a and a ternary autocorrelation section code set generation unit 132b.

The ternary autocorrelation section preferred pair code generation unit 132a extends the code period for a code having a period of N chips (N is a natural number) to obtain a ternary zero correlation section preferred pair code in which zero correlation characteristics are maintained. It creates a role.

The ternary self-correlation section code set generation unit 132b performs a chip shift on the ternary zero-correlation section preferred pair code generated by the ternary auto-correlation section preferred pair code generating means to generate a ternary zero-correlation section code set. It creates a role.

,

}로 표시된다.First, the ternary preferred pairs (TPP) of a period having a zero correlation section of (0.75N + 1) (N = 4 × 2n (n = 1,2,3 ...)) are {

,

}.

={

,

,...,

}이고,

={

,

,...,

}이다.here,

= {

,

, ...,

}ego,

= {

,

, ...,

}to be.

,

}구조를 가진 초기의 기본행렬은 다음의 수학식 6과 같이 정의된다.{

,

} The initial base matrix with the structure is defined as in Equation 6 below.

                or

Here, +,-, and z are represented by 1, -1, and zero, respectively. Therefore, ± GA and ± GB are defined as in Equation 7 below.

는 (0.75×8)칩의 제로상관구간을 가지며 초기의 TPP로 정의된다.

를 사용하여 주기가 더 긴 TPP를 다음과 같은 확장된 방법으로 구성할 수가 있다.here,

Has a zero-correlation interval of (0.75 x 8) chips and is defined as the initial TPP.

You can use TPP to configure a longer period of TPP in the following extended ways.

의 TPP를 사용함으로서, 2m의 주기를 갖는 확장된 행렬 DA 또는 DB를 수학식 8과 같이 생성한다.That is, m = 4 × 2i (i = 1,2,3 ...)

By using the TPP, an extended matrix DA or DB having a period of 2m is generated as in Equation (8).

Here, DA and DB are generated from ± GA and ± GB, respectively.

이고,

,

,

,

이다. ±DA 또는 ±DB는 주기 2m을 가진

이다.here,

ego,

,

,

,

to be. ± DA or ± DB cycle with 2m

to be.

는

로부터 발생되어진다. 여기서,

이다.

는 (0.75×2m+1) 칩의 제로상관구간을 갖는 TPP이다.And,

Is

Is generated from here,

to be.

Is a TPP having a zero correlation interval of (0.75 × 2 m + 1) chip.

가 구성된다.
Therefore, in order to have a period of N = 4 × 2n (n = 1,2,3, ...), it has a zero correlation section of (0.75N + 1) chip.

Is composed.

As an example, Figure 5 shows a graph of autocorrelation and cross-correlation characteristics of a ternary zero-correlation spread code having a 128-chip period in accordance with the present invention.

를 이용하여 칩쉬프트시켜 구성된다. 주기적으로 1칩만큼 왼쪽으로 이동시켜 생성된 N주기를 갖는 M 터너리 제로상관구간 수열의 셋(Set)은 다음의 수학식 9와 같이 표현할 수가 있다.That is, a set of M ternary zero-phase interval sequences means a sequence having M families that satisfy ZCD ≦ (0.75N + 1). This set is

It is configured by chip shift using. A set of M-turnary zero-correlation interval sequences having N cycles generated by periodically moving left by one chip may be expressed as in Equation 9 below.

을 만족하며, 이때 △는 양수이고, k는 음이 아닌 정수이다. 생성된 수열의 M과 제로상관구간은 수학식 10에 의해 연산할 수가 있다.Here, Δ denotes the number of digits shifted, and k is the maximum number that can be shifted in the sequence. △ and k are

Where Δ is a positive number and k is a nonnegative integer. M and the zero correlation section of the generated sequence can be calculated by the equation (10).

Thus, the generated sequence is normalized to have an ACF peak value of 0.5.

Hereinafter, an interference cancellation type remote and remote monitoring control method using a continuous orthogonal code set according to the present invention will be described.

First, the data generation unit of the remote sensor node unit monitors the operation state and generates measured information data as a digital signal.

Subsequently, the transmission signal modulator modulates the information data generated by the data generator in symbol units using m-PSK.

Subsequently, the spreading code generator generates a spreading code using a zero correlation duration (ZCD) codeset that is orthogonally orthogonally crossed for a predetermined period.

Subsequently, the spread spectrum code spreads the information data modulated by the transmission signal modulator through the spreading code.

Subsequently, the spread spectrum signal is sent to the remote / remote monitoring control terminal.

Subsequently, the band filter receiver of the remote / remote monitoring control terminal receives the signal from a plurality of remote sensor node units.

Subsequently, the signal processing process is performed through a maximum likelihood decision method that derives the correlation characteristics of the spreading code received from the soft decision-based correlation processing unit and selects the maximum value.

Subsequently, the reference code generator generates a reference code used for the soft decision-based correlation processor.

Then, the received signal demodulator demodulates the signal received by the band filter receiver.

Finally, the data restorer restores the data demodulated by the received signal demodulator.

100: remote sensor node 110: data generation unit
120: transmission signal modulator 130: spreading code generator
140: band spreader 150: band filter transmission unit
200: remote and remote monitoring and control terminal 210: band filter receiver
220: soft decision-based correlation processing unit 230: reference code generation unit
240: received signal demodulator 250: data recovery unit

Claims (5)

It is installed on one side of the equipment to monitor the operation status or measure the operation status, and it monitors the operation status and generates the spreading code which is orthogonal to the measured data continuously for a certain period. Remote sensor node unit 100 to be sent to the monitoring control terminal,
Located near the remote sensor node and receiving information data from the remote sensor node, sending command data, and determining the maximum likelihood of selecting the maximum value by deriving the correlation characteristics of the spreading code received from the remote sensor node. In the configuration of the remote and remote monitoring control terminal 200 to remove the bidirectional data signal interference between a plurality of remote sensor node unit based on the (Maximum Likelihood Decision) method,
The remote sensor node unit 100
A data generating unit 110 for monitoring the operation state and generating measured information data;
A transmission signal modulator 120 for modulating the information data generated by the data generator by symbol unit using m-PSK;
A spreading code generator 130 for generating a spreading code using a zero correlation duration (ZCD) code set that is orthogonally orthogonally crossed for a predetermined period;
A band spreader 140 for spreading information data modulated by the transmission signal modulator through a spread code generated by the spread code generator;
An interference cancellation type remote and remote monitoring and control device using a continuous orthogonal code set, characterized by comprising a band filter transmission unit (150) for transmitting a signal spread in the band spreading unit to a remote and remote monitoring control terminal.
delete The remote and remote monitoring and control terminal 200 according to claim 1
Band filter receiver 210 receives from a plurality of remote sensor node,
A soft decision-based correlation processor 220 which performs a signal processing process through a maximum likelihood decision method of deriving a correlation characteristic of a received spreading code and selecting a maximum value;
A reference code generator 230 for generating a reference code used for the soft decision-based correlation processing unit;
A received signal demodulator 240 for demodulating the signal received by the band filter receiver;
An interference cancellation type remote and remote monitoring and control device using a continuous orthogonal code set, characterized in that it comprises a data recovery unit (250) for recovering the data demodulated by the received signal demodulation unit.
The spreading code generator 130 of claim 1, wherein
Binary code that generates a spreading code that becomes zero for a code with period N chips (N is a natural number) for a certain time interval with a side love around the peak of autocorrelation less than (N / 2 + 1) chip. ) Zero correlation code (131),
For a code with period N chips (N is a natural number), a ternary that generates a diffusion code that becomes zero for a certain time interval with a side love around the peak of autocorrelation value or less than (0.75N + 1) chip. ) An interference cancellation type remote and remote monitoring and control device using a continuous orthogonal code set, characterized in that it comprises a zero correlation section code (132).
Monitoring the operation state in the data generating unit of the remote sensor node unit and generating measured data as a digital signal (S10);
Modulating the information data generated by the data generator by the transmission signal modulator by symbol unit using m-PSK (S20);
Generating a spreading code by using a spreading code set continuously orthogonal for a predetermined period in the spreading code generation unit (S30);
Spreading the information data modulated by the transmission signal modulator through a spreading code by the spreader (S40);
Transmitting the signal spread by the spreader to the remote / remote monitoring control terminal (S50);
Receiving from a plurality of remote sensor node units at a band filter receiver of a remote / remote monitoring control terminal (S60),
Performing a signal processing process through a maximum likelihood decision method of deriving a correlation characteristic of a spreading code received from a soft decision-based based correlation processor and selecting a maximum value (S70);
Generating a reference code used for the soft decision-based correlation processing unit in the reference code generator (S80);
Demodulating the signal received by the band filter receiver by the received signal demodulator (S90);
Restoring the interference-free remote and remote monitoring method using a continuous orthogonal code set, characterized in that the step of restoring data in the data recovery unit (S100).

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